diff --git a/tests/test_report.py b/tests/test_report.py
new file mode 100644
index 0000000..8df1874
--- /dev/null
+++ b/tests/test_report.py
@@ -0,0 +1,78 @@
+import pytest
+from pathlib import Path
+import tempfile
+
+from config_auditor.report import ReportGenerator
+from config_auditor.rules import Issue
+
+
+class TestReportGenerator:
+    def test_to_json(self):
+        issues = [
+            Issue(
+                severity="critical",
+                category="test",
+                message="Test issue",
+                file=Path("test.json"),
+            )
+        ]
+        generator = ReportGenerator()
+        result = generator.to_json(issues)
+
+        assert "critical" in result
+        assert "Test issue" in result
+
+    def test_to_yaml(self):
+        issues = [
+            Issue(
+                severity="warning",
+                category="test",
+                message="Warning issue",
+                file=Path("test.json"),
+            )
+        ]
+        generator = ReportGenerator()
+        result = generator.to_yaml(issues)
+
+        assert "warning" in result
+        assert "Warning issue" in result
+
+    def test_to_text(self):
+        issues = [
+            Issue(
+                severity="critical",
+                category="test",
+                message="Critical issue",
+                file=Path("test.json"),
+                suggestion="Fix this",
+            )
+        ]
+        generator = ReportGenerator()
+
+        output = []
+        generator.to_text(issues, output.append)
+
+        assert len(output) > 0
+        assert any("Critical" in line for line in output)
+
+    def test_empty_issues_text_output(self):
+        issues = []
+        generator = ReportGenerator()
+
+        output = []
+        generator.to_text(issues, output.append)
+
+        assert any("No issues found" in line for line in output)
+
+    def test_generate_summary(self):
+        issues = [
+            Issue(severity="critical", category="a", message="1", file=Path("f1")),
+            Issue(severity="critical", category="b", message="2", file=Path("f2")),
+            Issue(severity="warning", category="c", message="3", file=Path("f3")),
+        ]
+        generator = ReportGenerator()
+        summary = generator.generate_summary(issues)
+
+        assert summary["total"] == 3
+        assert summary["by_severity"]["critical"] == 2
+        assert summary["by_severity"]["warning"] == 1